# Copyright (c) 2023-2024, Zexin He
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


class Registry:
    """Registry class"""

    def __init__(self):
        self._registry = {}

    def register(self, name):
        """Register a module"""
        def decorator(cls):
            assert name not in self._registry, 'Module {} already registered'.format(name)
            self._registry[name] = cls
            return cls
        return decorator

    def __getitem__(self, name):
        """Get a module"""
        return self._registry[name]

    def __contains__(self, name):
        return name in self._registry
